Polished inside and out this weekend...every piece of fiberglass...under seats etc...cannot do that with polisher...lol...elbow grease only! Cannot imagine that a polisher could have got it shiney but I'll take your word for it...

I've been using a the same porter cable for a few years now with ZERO problems. Still feels, looks, and works like the day I got it. I polished out a ton of cars and a few boats with it. Can't beat it for the money.

The 7424 is the older model and was replaced by the 7424XP. Some perceive the older model to be better and since it is no longer available the price for NOS units is high. At the same price the old one might be preferred, but I don't see paying a premium for it.